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Survival curves of 5 × 107 B. subtilis spores inoculated by spray (∘, open circles) or liquid (•, closed circles) deposition after exposure to X rays (200 mA, 15 keV) (A), 254-nm UV-C radiation (B), low-pressure argon plasma (500 W, 10 Pa, 100 sccm Ar) (C), and 400-nm blue light (D).
